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Let me get this right....
There's been a lot of discussion on the list over the past few days about
advanced theropod phyloginies. From what I am hearing, it seems that
Arctometatarsalia might be a sister group to Enantiornithoformes, which
together is a sister group to all other birds (including Avimimids and
Alverezsaurids; not including Archaeopterygids). All that put together is a
sister group to Carnosuria. Am I correct?
I'll try to draw a cladogram of what I think I am hearing:
Ar Co Ty Tr O E Av Al B Ca
\ \ \ \ / / \ / / /
\ \ \ \/ / \/ / /
\ \ \ / / \ / /
\ \ / / / /
\ \/ / / /
\ \ / / /
\ \/ / /
\ \ / /
\ \ / /
\ \/ /
\ / /
Ar = Archaeopterygidae (including Dromeosaurinae); Co = Compsignathidae; Ty =
Tyrannosauridae (including Aublysodontidae); Tr = Troodontidae; O =
Ornithomimosauria; E = Enantiornithoformes; Av = Avimimidae; Al =
Alverezsauridae; B = all other Birds; Ca = Carnosauria.
I know I'm leaving out quite a few advanced theropods, but I did put in the
important ones (according to the cladogram). Is this even close to right?
Hmm... I wonder why there is no therizinosauroidea in my cladogram? Ya,
that's for you Tom.